CN204752784U - Converter coal gas processing system - Google Patents

Converter coal gas processing system Download PDF

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Publication number
CN204752784U
CN204752784U CN201520418411.2U CN201520418411U CN204752784U CN 204752784 U CN204752784 U CN 204752784U CN 201520418411 U CN201520418411 U CN 201520418411U CN 204752784 U CN204752784 U CN 204752784U
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coal gas
gas
salt
steam
converter
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周平
曹盛华
阮祥志
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Wisdri Engineering and Research Incorporation Ltd
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Wisdri Engineering and Research Incorporation Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency

Abstract

The utility model relates to a converter coal gas processing system, include the high temperature coal gas processing section, dust removal mechanism, draught fan and the switching station that feed through in proper order through the coal gas pipeline, switch over the station and be connected with coal gas exhausting section and the coal gas section of diffusing, the high temperature coal gas processing section includes high temperature coal gas waste heat recovery mechanism, and high temperature coal gas waste heat recovery mechanism includes saturated steam production structure and the steam heat accumulator that is used for saving saturated steam, the coal gas section of diffusing is including being used for retrieving the fused salt circulation mechanism of diffusing the coal gas waste heat, fused salt circulation mechanism include hot melt salt production structure and with the steam superheater of hot melt salt heat transfer, the steam heat accumulator passes through steam pipework and steam superheater intercommunication. But this processing system effective recycling diffuses the physics sensible heat of converter coal gas, reduces evaporative cooler's water consumption, can produce superheated steam consecutively.

Description

Coal gas of converter treatment system
Technical field
The utility model belongs to metallurgy industry technical field, is specifically related to a kind of coal gas of converter treatment system.
Background technology
Converter gas dry-dedusting system is the purification coal gas flow process extensively adopted in metallurgical industry converter steelmaking process.
Converter gas dry-dedusting system mainly comprises gasification cooling flue, evaporative cooler, thick, smart cleaning apparatus, induced draft fan, switching station etc.First gas temperature is reduced to about 850 DEG C by gasification cooling flue by coal gas of converter, then through about evaporative cooler spray cooling to 200 DEG C, then electrostatic or sack cleaner dedusting, then go switching station by induced draft fan, according to CO and O in coal gas 2content determines to reclaim or emission coal gas.
In above-mentioned dry method dust flow process, although reclaimed part physical waste heat, converter is in front burning phase and rear burning phase, and CO content is lower, as CO content <30% or O in coal gas 2during >2% content, coal gas will be diffused by chimney.The mode of diffusing is the portfire point coal gas utilizing chimney top, underproof for component content gas-fired is fallen, general in order to light and perfect combustion coal gas, chimney top is many times provided with torch kept burning day and night, these coal gas burn in vain, produce heat and enter air, waste mass energy, does not meet environmental requirement simultaneously yet.
Therefore be necessary to design a kind of coal gas of converter treatment system, to overcome the problems referred to above.
Utility model content
The purpose of this utility model is the defect overcoming prior art, provides a kind of coal gas of converter treatment system, the physical sensible heat in recyclable more coal gas of converter, simultaneously continuable production superheated vapour.
The utility model is achieved in that
The utility model provides a kind of coal gas of converter treatment system, comprise the coal gas of high temperature processing section, dedusting mechanism, induced draft fan and the switching station that are communicated with successively by gaspipe line, described switching station is provided with the first gas exit and the second gas exit that switch and open and close, described first gas exit is connected with coal-gas recovering section, and described second gas exit is connected with coal gas diffusion section; Described coal gas of high temperature processing section comprises coal gas of high temperature waste heat recovering mechanism, and described coal gas of high temperature waste heat recovering mechanism comprises saturation steam production structure and the steam accumulator for storing saturation steam; Described coal gas diffusion section comprises the fused salt cycling mechanism for reclaiming emission coal gas waste heat, described fused salt cycling mechanism comprises hot melt salt production structure and the vapor superheater with hot fused salt heat exchanging, and described steam accumulator is communicated with described vapor superheater by vapour line.
Further, described hot melt salt production structure comprises combustion heat release room, described combustion heat release room is provided with emission coal gas entrance, combustion product gases outlet and gas inlet, described emission coal gas entrance is communicated with described switching station, described combustion product gases outlet is communicated with chimney, and described gas inlet is connected with gas blower; Described vapor superheater comprises sweating room, and described sweating room is communicated with described steam accumulator by vapour line; Described fused salt cycling mechanism also comprises fused salt circulation loop, and described fused salt circulation loop is each passed through described combustion heat release room and described sweating room.
Further, described fused salt circulation loop comprises the hot molten salt pipeline of heat supply fused salt circulation and the cold molten salt pipeline of cooling fused salt circulation, and described hot molten salt pipeline is provided with hot melt salt cellar, and described cold molten salt pipeline is provided with sloppy heat salt cellar.
Further, the hot molten salt pipeline between described hot melt salt cellar and described sweating room is provided with hot melt salt pump, and the cold molten salt pipeline between described sloppy heat salt cellar and described combustion heat release room is provided with sloppy heat salt pump.
Further, described fused salt circulation loop is positioned at all snakelike layout of pipeline of described combustion heat release indoor and described sweating room.
Further, the temperature of described hot melt salt is 300 ~ 500 DEG C, and described vapor superheater comprises superheated vapour outlet, and the temperature of superheated vapour is 250 ~ 450 DEG C.
Further, described saturation steam production structure comprises gasification cooling flue and drum, and described gasification cooling flue two ends export with coal gas of converter respectively and are communicated with described dedusting mechanism; Cooling water pipeline is provided with in described gasification cooling flue wall, described cooling water pipeline is provided with cooling water inlet and pneumatic outlet, described drum is provided with gas inlet, cooling water outlet and saturation steam outlet, described cooling water inlet is communicated with described cooling water outlet, described pneumatic outlet is communicated with described gas inlet, and described saturation steam outlet is communicated with described steam accumulator.
Further, the connecting water pipe between described cooling water outlet and described cooling water inlet is provided with recycle pump.
Further, described coal gas of high temperature processing section also comprises evaporative cooler, and described evaporative cooler is located between described gasification cooling flue and described dedusting mechanism.
Further, described dedusting mechanism comprises the rough cleaner and smart fly-ash separator that set gradually along coal gas circulating direction, described rough cleaner is gravitational precipitator, centrifugal deduster or inertial dust separator, and described smart fly-ash separator is sack cleaner, electrostatic precipitator or Ceramic dust collector.
The utility model has following beneficial effect: the heat being reclaimed high temperature coal gas of converter by gasification cooling flue, is reclaimed the heat diffusing coal gas of converter by fused salt cycling mechanism, and can diffuse the physical sensible heat of coal gas of converter by efficient recovery, utilization rate of waste heat is high.In vapor superheater, saturation steam is heated as superheated vapour by hot melt salt, and hot melt salt and saturation steam can store respectively, therefore produce superheated vapour serially, by being interrupted oxygen blown impact, can not facilitate the use of follow-up steam user.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of the coal gas of converter treatment system that Fig. 1 provides for the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, other embodiments all that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belong to the scope of the utility model protection.
As Fig. 1, the present embodiment provides a kind of coal gas of converter treatment system, comprise the coal gas of high temperature processing section, dedusting mechanism, induced draft fan 7 and the switching station 8 that are communicated with successively by gaspipe line, described switching station 8 is provided with the first gas exit and the second gas exit that switch and open and close, described first gas exit is connected with coal-gas recovering section, described second gas exit is connected with coal gas diffusion section, can according to CO and O in coal gas 2content is selected by coal-gas recovering section gas recovery or by coal gas diffusion section emission coal gas.Wherein, coal-gas recovering section comprises the gas cooler 9 and gas chamber 10 that connect successively, and gas cooler 9 is connected with the first gas exit.Dedusting mechanism comprises the one-time dedusting mechanism and final dusting mechanism that set gradually along coal gas circulating direction, and one-time dedusting mechanism comprises rough cleaner 5, and final dusting mechanism comprises smart fly-ash separator 6.
Described coal gas of high temperature processing section comprises coal gas of high temperature waste heat recovering mechanism, and described coal gas of high temperature waste heat recovering mechanism comprises saturation steam production structure and the steam accumulator 20 for storing saturation steam.Wherein, described saturation steam production structure comprises gasification cooling flue 1 and drum 3, and described gasification cooling flue 1 two ends export with coal gas of converter and described one-time dedusting mechanism connection respectively; Cooling water pipeline is provided with in described gasification cooling flue 1 wall, described cooling water pipeline is provided with cooling water inlet and pneumatic outlet, described drum 3 is provided with gas inlet, cooling water outlet and saturation steam outlet, described cooling water inlet is communicated with described cooling water outlet, described pneumatic outlet is communicated with described gas inlet, and described saturation steam outlet is communicated with steam accumulator 20.As required, the connecting water pipe between the cooling water outlet and the cooling water inlet of cooling water pipeline of drum 3 can arrange recycle pump 4, the cycle efficiency of water coolant is provided.Water coolant in drum 3 enters cooling water pipeline, and the coal gas of high temperature be vaporized in cooling stack 1 is heated into steam water interface, and this steam water interface enters in drum 3, and the saturation steam in drum 3 enters in steam accumulator 20 through pipeline and stores.The temperature of described saturation steam is at 170 ~ 250 DEG C, and after gasification cooling flue 1, coal gas of high temperature temperature is down to 800 ~ 900 DEG C.
Further, described coal gas of high temperature processing section also comprises evaporative cooler 2, and described evaporative cooler 2 is located between described gasification cooling flue 1 and described one-time dedusting mechanism.The coal gas cooled through gasification cooling flue 1 enters in evaporative cooler 2, sprays water and goes out except the kindling material in coal gas, and make coal gas be cooled to 400 ~ 600 DEG C further in described evaporative cooler 2, forms low temperature coal gas.Spray water in evaporative cooler 2 and go out except the kindling material in coal gas, ensure that the safe operation of system.Owing to only coal gas need be cooled to 400 ~ 600 DEG C in evaporative cooler 2, therefore reduce the injection flow rate in evaporative cooler 2.
As Fig. 1, described coal gas diffusion section comprises the fused salt cycling mechanism for reclaiming emission coal gas waste heat, described fused salt cycling mechanism comprises hot melt salt production structure and the vapor superheater 19 with hot fused salt heat exchanging, and described steam accumulator 20 is communicated with described vapor superheater 19 by vapour line.Described hot melt salt production structure comprises combustion heat release room 11, described combustion heat release room 11 is provided with emission coal gas entrance, combustion product gases outlet and gas inlet, described emission coal gas entrance is communicated with described switching station 8, described combustion product gases outlet is communicated with chimney 14 by smoke exhaust fan 13, and described gas inlet is connected with gas blower 12.Described vapor superheater 19 comprises sweating room, and described sweating room is communicated with described steam accumulator 20 by vapour line; Described fused salt cycling mechanism also comprises fused salt circulation loop, and described fused salt circulation loop is each passed through described combustion heat release room 11 and described sweating room.Namely combustion heat release room 11 is arranged on coal gas diffusion pipeline, is absorbed the waste heat of low temperature coal gas by the heat transfer of fused salt and coal gas, and the hot melt salt after heating for heating saturation steam, thus produces superheated vapour.Wherein, the temperature of the hot melt salt of generation at 300 ~ 500 DEG C, from molten salt heater gas temperature out below 200 DEG C; The temperature of superheated vapour is at 250 ~ 450 DEG C.Be positioned at all snakelike layout of molten salt pipeline of described combustion heat release room 11 and described sweating room, the contact area of molten salt pipeline and coal gas or steam can be increased, improve heat transfer efficiency.Described vapor superheater 19 comprises superheated vapour outlet, and superheated vapour outlet is connected with steam user, and the quality of steam is high, applied widely.If follow-up steam user is turbine driven set, the superheated vapour that so temperature and pressure significantly raises can improve the thermo-efficiency of turbine driven set greatly, can also improve the inner carbonated drink situation of steam turbine simultaneously, reduce the corrosion of steam turbine afterbody blade.
Further, described fused salt circulation loop comprises the hot molten salt pipeline of heat supply fused salt circulation and the cold molten salt pipeline of cooling fused salt circulation, and described hot molten salt pipeline is provided with hot melt salt cellar 17, and described cold molten salt pipeline is provided with sloppy heat salt cellar 15.Hot molten salt pipeline between described hot melt salt cellar 17 and described sweating room is provided with hot melt salt pump 18, and the cold molten salt pipeline between described sloppy heat salt cellar 15 and described gas chamber is provided with sloppy heat salt pump 16.Hot melt salt cellar 17 is set, can store heat fused salt, be interrupted in oxygen blown process, when not oxygen blast, the hot melt salt stored by hot melt salt cellar 17 and the interior saturation steam stored of steam accumulator 20 are directed in vapor superheater 19, can realize the continuous seepage of superheated vapour, can not by being interrupted oxygen blown impact.
In the present embodiment, described rough cleaner 5 can be gravitational precipitator, centrifugal deduster or inertial dust separator, and described smart fly-ash separator 6 can be sack cleaner, electrostatic precipitator or Ceramic dust collector.In addition, fused salt also can replace with other thermal barrier.
The working process of the coal gas of converter treatment system that the present embodiment provides is:
The coal gas of converter that converter produces enters gasification cooling flue 1 and cools, water coolant in drum 3 enters the cooling water pipeline in gasification cooling flue 1 through recycle pump 4, water coolant and coal gas of converter heat exchange form steam water interface and get back in drum 3, the saturation steam in drum 3 through piping send outside to steam accumulator 20 fill heat store.
Enter evaporative cooler 2, spray cooling to 400 ~ 600 DEG C in evaporative cooler 2 from gasification cooling flue 1 coal gas of converter (temperature about 850 DEG C) out, form low temperature coal gas.Low temperature coal gas through rough cleaner 5 and smart fly-ash separator 6 dedusting successively, then enters switching station 8 by induced draft fan 7.
CO and O in coal gas of converter is detected by on-line equipment in switching station 8 2content, as the CO>30% in coal gas of converter and O 2during <2%, coal gas of converter enters gas cooler 9 by switching station 8 and is cooled to about 70 DEG C, then enters gas chamber 10 and stores.As CO<30% or O in coal gas of converter 2during >2%, coal gas of converter enters combustion heat-exchange indoor by switching station 8 switching and burns, and is the coal gas Thorough combustion ensureing combustion heat-exchange indoor, by gas blower 12 to the indoor feeding air of combustion heat-exchange; The radiant heat of burning and flue gas heat are used for heating sloppy heat salt to about 500 DEG C, and the flue gas cool-down after heat exchange, to about 200 DEG C, is disposed to air through smoke exhaust fan 13 and chimney 14.
In combustion heat-exchange room, entered hot melt salt cellar 17 by the hot melt salt heated store, hot melt salt pump 18 sucks hot melt salt and is sent to vapor superheater 19 from hot melt salt cellar 17, after vapor superheater 19, temperature of molten salt drops to about 250 DEG C, then sloppy heat salt cellar 15 is entered, sloppy heat salt pump 16 is draw in cold fused salt from sloppy heat salt cellar 15, sends into combustion heat-exchange heating indoor, thus forms circulation.Saturation steam (170 ~ 250 DEG C) of sending outside in steam accumulator 20 delivers to vapor superheater 19 and hot fused salt heat exchanging through piping, and to be heated to form temperature be that the superheated vapour of 250 ~ 450 DEG C goes to steam user.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.

Claims (10)

1. a coal gas of converter treatment system, it is characterized in that: comprise the coal gas of high temperature processing section, dedusting mechanism, induced draft fan and the switching station that are communicated with successively by gaspipe line, described switching station is provided with the first gas exit and the second gas exit that switch and open and close, described first gas exit is connected with coal-gas recovering section, and described second gas exit is connected with coal gas diffusion section; Described coal gas of high temperature processing section comprises coal gas of high temperature waste heat recovering mechanism, and described coal gas of high temperature waste heat recovering mechanism comprises saturation steam production structure and the steam accumulator for storing saturation steam; Described coal gas diffusion section comprises the fused salt cycling mechanism for reclaiming emission coal gas waste heat, described fused salt cycling mechanism comprises hot melt salt production structure and the vapor superheater with hot fused salt heat exchanging, and described steam accumulator is communicated with described vapor superheater by vapour line.
2. coal gas of converter treatment system according to claim 1, it is characterized in that: described hot melt salt production structure comprises combustion heat release room, described combustion heat release room is provided with emission coal gas entrance, combustion product gases outlet and gas inlet, described emission coal gas entrance is communicated with described switching station, described combustion product gases outlet is communicated with chimney, and described gas inlet is connected with gas blower; Described vapor superheater comprises sweating room, and described sweating room is communicated with described steam accumulator by vapour line; Described fused salt cycling mechanism also comprises fused salt circulation loop, and described fused salt circulation loop is each passed through described combustion heat release room and described sweating room.
3. coal gas of converter treatment system according to claim 2, it is characterized in that: described fused salt circulation loop comprises the hot molten salt pipeline of heat supply fused salt circulation and the cold molten salt pipeline of cooling fused salt circulation, described hot molten salt pipeline is provided with hot melt salt cellar, and described cold molten salt pipeline is provided with sloppy heat salt cellar.
4. coal gas of converter treatment system according to claim 3, it is characterized in that: the hot molten salt pipeline between described hot melt salt cellar and described sweating room is provided with hot melt salt pump, the cold molten salt pipeline between described sloppy heat salt cellar and described combustion heat release room is provided with sloppy heat salt pump.
5. coal gas of converter treatment system according to claim 2, is characterized in that: described fused salt circulation loop is positioned at all snakelike layout of pipeline of described combustion heat release indoor and described sweating room.
6. coal gas of converter treatment system according to any one of claim 1 to 5, is characterized in that: the temperature of described hot melt salt is 300 ~ 500 DEG C, and described vapor superheater comprises superheated vapour outlet, and the temperature of superheated vapour is 250 ~ 450 DEG C.
7. coal gas of converter treatment system according to any one of claim 1 to 5, it is characterized in that: described saturation steam production structure comprises gasification cooling flue and drum, described gasification cooling flue two ends export with coal gas of converter respectively and are communicated with described dedusting mechanism; Cooling water pipeline is provided with in described gasification cooling flue wall, described cooling water pipeline is provided with cooling water inlet and pneumatic outlet, described drum is provided with gas inlet, cooling water outlet and saturation steam outlet, described cooling water inlet is communicated with described cooling water outlet, described pneumatic outlet is communicated with described gas inlet, and described saturation steam outlet is communicated with described steam accumulator.
8. coal gas of converter treatment system according to claim 7, is characterized in that: the connecting water pipe between described cooling water outlet and described cooling water inlet is provided with recycle pump.
9. coal gas of converter treatment system according to claim 7, is characterized in that: described coal gas of high temperature processing section also comprises evaporative cooler, and described evaporative cooler is located between described gasification cooling flue and described dedusting mechanism.
10. coal gas of converter treatment system according to claim 1, it is characterized in that: described dedusting mechanism comprises the rough cleaner and smart fly-ash separator that set gradually along coal gas circulating direction, described rough cleaner is gravitational precipitator, centrifugal deduster or inertial dust separator, and described smart fly-ash separator is sack cleaner, electrostatic precipitator or Ceramic dust collector.
CN201520418411.2U 2015-06-17 2015-06-17 Converter coal gas processing system Active CN204752784U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107893143A (en) * 2017-12-18 2018-04-10 北京京诚泽宇能源环保工程技术有限公司 A kind of dry dedusting of converter residual neat recovering system and technique
CN108485723A (en) * 2018-04-24 2018-09-04 东北大学 A kind of inflammable and explosive inorganization emission coal gas recycling system and technique

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107893143A (en) * 2017-12-18 2018-04-10 北京京诚泽宇能源环保工程技术有限公司 A kind of dry dedusting of converter residual neat recovering system and technique
CN107893143B (en) * 2017-12-18 2023-01-13 北京京诚泽宇能源环保工程技术有限公司 Converter gas dry dedusting waste heat recovery system and process
CN108485723A (en) * 2018-04-24 2018-09-04 东北大学 A kind of inflammable and explosive inorganization emission coal gas recycling system and technique
CN108485723B (en) * 2018-04-24 2021-06-08 东北大学 System and process for recycling inflammable and explosive inorganization diffused gas

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